Commit | Line | Data |
---|---|---|
48842b30 DG |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
3 | * | |
d14d33bf AM |
4 | * This program is free software; you can redistribute it and/or modify |
5 | * it under the terms of the GNU General Public License, version 2 only, | |
6 | * as published by the Free Software Foundation. | |
48842b30 | 7 | * |
d14d33bf AM |
8 | * This program is distributed in the hope that it will be useful, |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | * GNU General Public License for more details. | |
48842b30 | 12 | * |
d14d33bf AM |
13 | * You should have received a copy of the GNU General Public License along |
14 | * with this program; if not, write to the Free Software Foundation, Inc., | |
15 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
48842b30 DG |
16 | */ |
17 | ||
6c1c0768 | 18 | #define _LGPL_SOURCE |
48842b30 DG |
19 | #include <errno.h> |
20 | #include <stdio.h> | |
21 | #include <stdlib.h> | |
22 | #include <string.h> | |
23 | #include <unistd.h> | |
d88aee68 | 24 | #include <inttypes.h> |
48842b30 | 25 | |
990570ed | 26 | #include <common/common.h> |
c8fea79c | 27 | #include <common/consumer/consumer.h> |
990570ed | 28 | #include <common/defaults.h> |
48842b30 | 29 | |
00e2e675 | 30 | #include "consumer.h" |
8782cc74 | 31 | #include "health-sessiond.h" |
48842b30 | 32 | #include "ust-consumer.h" |
331744e3 JD |
33 | #include "buffer-registry.h" |
34 | #include "session.h" | |
e9404c27 | 35 | #include "lttng-sessiond.h" |
48842b30 DG |
36 | |
37 | /* | |
ffe60014 DG |
38 | * Return allocated full pathname of the session using the consumer trace path |
39 | * and subdir if available. On a successful allocation, the directory of the | |
40 | * trace is created with the session credentials. | |
41 | * | |
42 | * The caller can safely free(3) the returned value. On error, NULL is | |
43 | * returned. | |
48842b30 | 44 | */ |
ffe60014 DG |
45 | static char *setup_trace_path(struct consumer_output *consumer, |
46 | struct ust_app_session *ua_sess) | |
48842b30 | 47 | { |
ffe60014 DG |
48 | int ret; |
49 | char *pathname; | |
37278a1e | 50 | |
ffe60014 DG |
51 | assert(consumer); |
52 | assert(ua_sess); | |
00e2e675 | 53 | |
840cb59c | 54 | health_code_update(); |
ca03de58 | 55 | |
61ba6b6d JG |
56 | /* |
57 | * Allocate the string ourself to make sure we never exceed | |
58 | * LTTNG_PATH_MAX. | |
59 | */ | |
60 | pathname = zmalloc(LTTNG_PATH_MAX); | |
ffe60014 | 61 | if (!pathname) { |
48842b30 DG |
62 | goto error; |
63 | } | |
00e2e675 | 64 | |
ffe60014 DG |
65 | /* Get correct path name destination */ |
66 | if (consumer->type == CONSUMER_DST_LOCAL) { | |
67 | /* Set application path to the destination path */ | |
61ba6b6d | 68 | ret = snprintf(pathname, LTTNG_PATH_MAX, "%s%s%s%s", |
366a9222 JD |
69 | consumer->dst.session_root_path, |
70 | consumer->chunk_path, | |
71 | consumer->subdir, ua_sess->path); | |
ffe60014 DG |
72 | if (ret < 0) { |
73 | PERROR("snprintf channel path"); | |
74 | goto error; | |
75 | } | |
ca03de58 | 76 | |
ffe60014 | 77 | /* Create directory. Ignore if exist. */ |
7972aab2 DG |
78 | ret = run_as_mkdir_recursive(pathname, S_IRWXU | S_IRWXG, |
79 | ua_sess->euid, ua_sess->egid); | |
ffe60014 | 80 | if (ret < 0) { |
df5b86c8 | 81 | if (errno != EEXIST) { |
ffe60014 DG |
82 | ERR("Trace directory creation error"); |
83 | goto error; | |
84 | } | |
85 | } | |
86 | } else { | |
61ba6b6d | 87 | ret = snprintf(pathname, LTTNG_PATH_MAX, "%s%s%s%s", |
2b29c638 JD |
88 | consumer->dst.net.base_dir, |
89 | consumer->chunk_path, | |
90 | consumer->subdir, | |
ffe60014 DG |
91 | ua_sess->path); |
92 | if (ret < 0) { | |
93 | PERROR("snprintf channel path"); | |
94 | goto error; | |
95 | } | |
48842b30 DG |
96 | } |
97 | ||
ffe60014 | 98 | return pathname; |
ca03de58 | 99 | |
37278a1e | 100 | error: |
ffe60014 DG |
101 | free(pathname); |
102 | return NULL; | |
37278a1e DG |
103 | } |
104 | ||
105 | /* | |
e9404c27 | 106 | * Send a single channel to the consumer using command ASK_CHANNEL_CREATION. |
ffe60014 | 107 | * |
7972aab2 | 108 | * Consumer socket lock MUST be acquired before calling this. |
37278a1e | 109 | */ |
ffe60014 DG |
110 | static int ask_channel_creation(struct ust_app_session *ua_sess, |
111 | struct ust_app_channel *ua_chan, struct consumer_output *consumer, | |
7972aab2 | 112 | struct consumer_socket *socket, struct ust_registry_session *registry) |
37278a1e | 113 | { |
0c759fc9 | 114 | int ret, output; |
7972aab2 DG |
115 | uint32_t chan_id; |
116 | uint64_t key, chan_reg_key; | |
ffe60014 | 117 | char *pathname = NULL; |
37278a1e | 118 | struct lttcomm_consumer_msg msg; |
7972aab2 | 119 | struct ust_registry_channel *chan_reg; |
d7ba1388 | 120 | char shm_path[PATH_MAX] = ""; |
3d071855 | 121 | char root_shm_path[PATH_MAX] = ""; |
37278a1e | 122 | |
ffe60014 DG |
123 | assert(ua_sess); |
124 | assert(ua_chan); | |
125 | assert(socket); | |
37278a1e | 126 | assert(consumer); |
7972aab2 | 127 | assert(registry); |
ffe60014 DG |
128 | |
129 | DBG2("Asking UST consumer for channel"); | |
130 | ||
131 | /* Get and create full trace path of session. */ | |
10a50311 JD |
132 | if (ua_sess->output_traces) { |
133 | pathname = setup_trace_path(consumer, ua_sess); | |
134 | if (!pathname) { | |
135 | ret = -1; | |
136 | goto error; | |
137 | } | |
ffe60014 DG |
138 | } |
139 | ||
7972aab2 DG |
140 | /* Depending on the buffer type, a different channel key is used. */ |
141 | if (ua_sess->buffer_type == LTTNG_BUFFER_PER_UID) { | |
142 | chan_reg_key = ua_chan->tracing_channel_id; | |
143 | } else { | |
144 | chan_reg_key = ua_chan->key; | |
145 | } | |
146 | ||
147 | if (ua_chan->attr.type == LTTNG_UST_CHAN_METADATA) { | |
148 | chan_id = -1U; | |
d7ba1388 MD |
149 | /* |
150 | * Metadata channels shm_path (buffers) are handled within | |
151 | * session daemon. Consumer daemon should not try to create | |
152 | * those buffer files. | |
153 | */ | |
7972aab2 DG |
154 | } else { |
155 | chan_reg = ust_registry_channel_find(registry, chan_reg_key); | |
156 | assert(chan_reg); | |
157 | chan_id = chan_reg->chan_id; | |
d7ba1388 MD |
158 | if (ua_sess->shm_path[0]) { |
159 | strncpy(shm_path, ua_sess->shm_path, sizeof(shm_path)); | |
160 | shm_path[sizeof(shm_path) - 1] = '\0'; | |
161 | strncat(shm_path, "/", | |
162 | sizeof(shm_path) - strlen(shm_path) - 1); | |
163 | strncat(shm_path, ua_chan->name, | |
164 | sizeof(shm_path) - strlen(shm_path) - 1); | |
165 | strncat(shm_path, "_", | |
166 | sizeof(shm_path) - strlen(shm_path) - 1); | |
167 | } | |
3d071855 MD |
168 | strncpy(root_shm_path, ua_sess->root_shm_path, sizeof(root_shm_path)); |
169 | root_shm_path[sizeof(root_shm_path) - 1] = '\0'; | |
7972aab2 DG |
170 | } |
171 | ||
0c759fc9 DG |
172 | switch (ua_chan->attr.output) { |
173 | case LTTNG_UST_MMAP: | |
174 | default: | |
175 | output = LTTNG_EVENT_MMAP; | |
176 | break; | |
177 | } | |
178 | ||
ffe60014 DG |
179 | consumer_init_ask_channel_comm_msg(&msg, |
180 | ua_chan->attr.subbuf_size, | |
181 | ua_chan->attr.num_subbuf, | |
182 | ua_chan->attr.overwrite, | |
183 | ua_chan->attr.switch_timer_interval, | |
184 | ua_chan->attr.read_timer_interval, | |
ecc48a90 | 185 | ua_sess->live_timer_interval, |
e9404c27 | 186 | ua_chan->monitor_timer_interval, |
0c759fc9 | 187 | output, |
ffe60014 | 188 | (int) ua_chan->attr.type, |
7972aab2 | 189 | ua_sess->tracing_id, |
ca22feea | 190 | pathname, |
ffe60014 | 191 | ua_chan->name, |
7972aab2 DG |
192 | ua_sess->euid, |
193 | ua_sess->egid, | |
ffe60014 DG |
194 | consumer->net_seq_index, |
195 | ua_chan->key, | |
7972aab2 | 196 | registry->uuid, |
1624d5b7 JD |
197 | chan_id, |
198 | ua_chan->tracefile_size, | |
2bba9e53 | 199 | ua_chan->tracefile_count, |
1950109e | 200 | ua_sess->id, |
567eb353 | 201 | ua_sess->output_traces, |
d7ba1388 | 202 | ua_sess->uid, |
491d1539 | 203 | ua_chan->attr.blocking_timeout, |
3d071855 | 204 | root_shm_path, shm_path); |
37278a1e | 205 | |
840cb59c | 206 | health_code_update(); |
ca03de58 | 207 | |
52898cb1 | 208 | ret = consumer_socket_send(socket, &msg, sizeof(msg)); |
37278a1e DG |
209 | if (ret < 0) { |
210 | goto error; | |
211 | } | |
212 | ||
ffe60014 DG |
213 | ret = consumer_recv_status_channel(socket, &key, |
214 | &ua_chan->expected_stream_count); | |
215 | if (ret < 0) { | |
216 | goto error; | |
217 | } | |
218 | /* Communication protocol error. */ | |
219 | assert(key == ua_chan->key); | |
220 | /* We need at least one where 1 stream for 1 cpu. */ | |
10a50311 JD |
221 | if (ua_sess->output_traces) { |
222 | assert(ua_chan->expected_stream_count > 0); | |
223 | } | |
ffe60014 | 224 | |
d88aee68 | 225 | DBG2("UST ask channel %" PRIu64 " successfully done with %u stream(s)", key, |
ffe60014 | 226 | ua_chan->expected_stream_count); |
ca03de58 | 227 | |
37278a1e | 228 | error: |
ffe60014 DG |
229 | free(pathname); |
230 | health_code_update(); | |
37278a1e DG |
231 | return ret; |
232 | } | |
233 | ||
234 | /* | |
ffe60014 DG |
235 | * Ask consumer to create a channel for a given session. |
236 | * | |
e9404c27 JG |
237 | * Session list and rcu read side locks must be held by the caller. |
238 | * | |
ffe60014 | 239 | * Returns 0 on success else a negative value. |
37278a1e | 240 | */ |
ffe60014 DG |
241 | int ust_consumer_ask_channel(struct ust_app_session *ua_sess, |
242 | struct ust_app_channel *ua_chan, struct consumer_output *consumer, | |
7972aab2 | 243 | struct consumer_socket *socket, struct ust_registry_session *registry) |
37278a1e DG |
244 | { |
245 | int ret; | |
e9404c27 | 246 | struct ltt_session *session; |
37278a1e | 247 | |
ffe60014 DG |
248 | assert(ua_sess); |
249 | assert(ua_chan); | |
250 | assert(consumer); | |
251 | assert(socket); | |
7972aab2 | 252 | assert(registry); |
f50f23d9 | 253 | |
d9078d0c DG |
254 | if (!consumer->enabled) { |
255 | ret = -LTTNG_ERR_NO_CONSUMER; | |
256 | DBG3("Consumer is disabled"); | |
257 | goto error; | |
258 | } | |
259 | ||
e9404c27 JG |
260 | session = session_find_by_id(ua_sess->tracing_id); |
261 | assert(session); | |
262 | ||
ffe60014 | 263 | pthread_mutex_lock(socket->lock); |
7972aab2 | 264 | ret = ask_channel_creation(ua_sess, ua_chan, consumer, socket, registry); |
2898de39 | 265 | pthread_mutex_unlock(socket->lock); |
37278a1e | 266 | if (ret < 0) { |
e9404c27 | 267 | ERR("ask_channel_creation consumer command failed"); |
37278a1e DG |
268 | goto error; |
269 | } | |
270 | ||
48842b30 DG |
271 | error: |
272 | return ret; | |
273 | } | |
274 | ||
275 | /* | |
ffe60014 DG |
276 | * Send a get channel command to consumer using the given channel key. The |
277 | * channel object is populated and the stream list. | |
278 | * | |
279 | * Return 0 on success else a negative value. | |
48842b30 | 280 | */ |
ffe60014 DG |
281 | int ust_consumer_get_channel(struct consumer_socket *socket, |
282 | struct ust_app_channel *ua_chan) | |
48842b30 | 283 | { |
ffe60014 | 284 | int ret; |
37278a1e | 285 | struct lttcomm_consumer_msg msg; |
48842b30 | 286 | |
ffe60014 DG |
287 | assert(ua_chan); |
288 | assert(socket); | |
48842b30 | 289 | |
53efb85a | 290 | memset(&msg, 0, sizeof(msg)); |
ffe60014 DG |
291 | msg.cmd_type = LTTNG_CONSUMER_GET_CHANNEL; |
292 | msg.u.get_channel.key = ua_chan->key; | |
37278a1e | 293 | |
ffe60014 | 294 | pthread_mutex_lock(socket->lock); |
840cb59c | 295 | health_code_update(); |
ca03de58 | 296 | |
ffe60014 DG |
297 | /* Send command and wait for OK reply. */ |
298 | ret = consumer_send_msg(socket, &msg); | |
37278a1e DG |
299 | if (ret < 0) { |
300 | goto error; | |
301 | } | |
302 | ||
ffe60014 | 303 | /* First, get the channel from consumer. */ |
9363801e | 304 | ret = ustctl_recv_channel_from_consumer(*socket->fd_ptr, &ua_chan->obj); |
37278a1e | 305 | if (ret < 0) { |
ffe60014 DG |
306 | if (ret != -EPIPE) { |
307 | ERR("Error recv channel from consumer %d with ret %d", | |
9363801e | 308 | *socket->fd_ptr, ret); |
ffe60014 DG |
309 | } else { |
310 | DBG3("UST app recv channel from consumer. Consumer is dead."); | |
311 | } | |
37278a1e DG |
312 | goto error; |
313 | } | |
00e2e675 | 314 | |
ffe60014 DG |
315 | /* Next, get all streams. */ |
316 | while (1) { | |
317 | struct ust_app_stream *stream; | |
ca03de58 | 318 | |
ffe60014 DG |
319 | /* Create UST stream */ |
320 | stream = ust_app_alloc_stream(); | |
321 | if (stream == NULL) { | |
322 | ret = -ENOMEM; | |
48842b30 DG |
323 | goto error; |
324 | } | |
325 | ||
ffe60014 | 326 | /* Stream object is populated by this call if successful. */ |
9363801e | 327 | ret = ustctl_recv_stream_from_consumer(*socket->fd_ptr, &stream->obj); |
37278a1e | 328 | if (ret < 0) { |
ffe60014 DG |
329 | free(stream); |
330 | if (ret == -LTTNG_UST_ERR_NOENT) { | |
331 | DBG3("UST app consumer has no more stream available"); | |
ffe60014 DG |
332 | break; |
333 | } | |
334 | if (ret != -EPIPE) { | |
335 | ERR("Recv stream from consumer %d with ret %d", | |
9363801e | 336 | *socket->fd_ptr, ret); |
ffe60014 DG |
337 | } else { |
338 | DBG3("UST app recv stream from consumer. Consumer is dead."); | |
00e2e675 | 339 | } |
48842b30 DG |
340 | goto error; |
341 | } | |
37278a1e | 342 | |
ffe60014 DG |
343 | /* Order is important this is why a list is used. */ |
344 | cds_list_add_tail(&stream->list, &ua_chan->streams.head); | |
345 | ua_chan->streams.count++; | |
37278a1e | 346 | |
5368d366 | 347 | DBG2("UST app stream %d received successfully", ua_chan->streams.count); |
ffe60014 DG |
348 | } |
349 | ||
350 | /* This MUST match or else we have a synchronization problem. */ | |
351 | assert(ua_chan->expected_stream_count == ua_chan->streams.count); | |
ca03de58 | 352 | |
ffe60014 DG |
353 | /* Wait for confirmation that we can proceed with the streams. */ |
354 | ret = consumer_recv_status_reply(socket); | |
37278a1e DG |
355 | if (ret < 0) { |
356 | goto error; | |
357 | } | |
358 | ||
359 | error: | |
ffe60014 DG |
360 | health_code_update(); |
361 | pthread_mutex_unlock(socket->lock); | |
37278a1e DG |
362 | return ret; |
363 | } | |
364 | ||
365 | /* | |
ffe60014 DG |
366 | * Send a destroy channel command to consumer using the given channel key. |
367 | * | |
368 | * Note that this command MUST be used prior to a successful | |
369 | * LTTNG_CONSUMER_GET_CHANNEL because once this command is done successfully, | |
370 | * the streams are dispatched to the consumer threads and MUST be teardown | |
371 | * through the hang up process. | |
372 | * | |
373 | * Return 0 on success else a negative value. | |
37278a1e | 374 | */ |
ffe60014 DG |
375 | int ust_consumer_destroy_channel(struct consumer_socket *socket, |
376 | struct ust_app_channel *ua_chan) | |
37278a1e | 377 | { |
ffe60014 DG |
378 | int ret; |
379 | struct lttcomm_consumer_msg msg; | |
a4b92340 | 380 | |
ffe60014 DG |
381 | assert(ua_chan); |
382 | assert(socket); | |
37278a1e | 383 | |
53efb85a | 384 | memset(&msg, 0, sizeof(msg)); |
ffe60014 DG |
385 | msg.cmd_type = LTTNG_CONSUMER_DESTROY_CHANNEL; |
386 | msg.u.destroy_channel.key = ua_chan->key; | |
173af62f | 387 | |
ffe60014 DG |
388 | pthread_mutex_lock(socket->lock); |
389 | health_code_update(); | |
37278a1e | 390 | |
ffe60014 | 391 | ret = consumer_send_msg(socket, &msg); |
37278a1e DG |
392 | if (ret < 0) { |
393 | goto error; | |
48842b30 DG |
394 | } |
395 | ||
ffe60014 DG |
396 | error: |
397 | health_code_update(); | |
398 | pthread_mutex_unlock(socket->lock); | |
399 | return ret; | |
400 | } | |
aeb96892 | 401 | |
ffe60014 DG |
402 | /* |
403 | * Send a given stream to UST tracer. | |
404 | * | |
405 | * On success return 0 else a negative value. | |
406 | */ | |
407 | int ust_consumer_send_stream_to_ust(struct ust_app *app, | |
408 | struct ust_app_channel *channel, struct ust_app_stream *stream) | |
409 | { | |
410 | int ret; | |
411 | ||
412 | assert(app); | |
413 | assert(stream); | |
414 | assert(channel); | |
415 | ||
416 | DBG2("UST consumer send stream to app %d", app->sock); | |
417 | ||
418 | /* Relay stream to application. */ | |
fb45065e | 419 | pthread_mutex_lock(&app->sock_lock); |
ffe60014 | 420 | ret = ustctl_send_stream_to_ust(app->sock, channel->obj, stream->obj); |
fb45065e | 421 | pthread_mutex_unlock(&app->sock_lock); |
ffe60014 DG |
422 | if (ret < 0) { |
423 | if (ret != -EPIPE && ret != -LTTNG_UST_ERR_EXITING) { | |
8cf93def DG |
424 | ERR("ustctl send stream handle %d to app pid: %d with ret %d", |
425 | stream->obj->handle, app->pid, ret); | |
ffe60014 DG |
426 | } else { |
427 | DBG3("UST app send stream to ust failed. Application is dead."); | |
48842b30 | 428 | } |
ffe60014 | 429 | goto error; |
48842b30 | 430 | } |
d0b96690 | 431 | channel->handle = channel->obj->handle; |
48842b30 | 432 | |
ffe60014 DG |
433 | error: |
434 | return ret; | |
435 | } | |
436 | ||
437 | /* | |
438 | * Send channel previously received from the consumer to the UST tracer. | |
439 | * | |
440 | * On success return 0 else a negative value. | |
441 | */ | |
442 | int ust_consumer_send_channel_to_ust(struct ust_app *app, | |
443 | struct ust_app_session *ua_sess, struct ust_app_channel *channel) | |
444 | { | |
445 | int ret; | |
446 | ||
447 | assert(app); | |
448 | assert(ua_sess); | |
449 | assert(channel); | |
450 | assert(channel->obj); | |
451 | ||
7972aab2 DG |
452 | DBG2("UST app send channel to sock %d pid %d (name: %s, key: %" PRIu64 ")", |
453 | app->sock, app->pid, channel->name, channel->tracing_channel_id); | |
48842b30 | 454 | |
ffe60014 | 455 | /* Send stream to application. */ |
fb45065e | 456 | pthread_mutex_lock(&app->sock_lock); |
ffe60014 | 457 | ret = ustctl_send_channel_to_ust(app->sock, ua_sess->handle, channel->obj); |
fb45065e | 458 | pthread_mutex_unlock(&app->sock_lock); |
ffe60014 DG |
459 | if (ret < 0) { |
460 | if (ret != -EPIPE && ret != -LTTNG_UST_ERR_EXITING) { | |
461 | ERR("Error ustctl send channel %s to app pid: %d with ret %d", | |
462 | channel->name, app->pid, ret); | |
463 | } else { | |
464 | DBG3("UST app send channel to ust failed. Application is dead."); | |
465 | } | |
466 | goto error; | |
467 | } | |
48842b30 DG |
468 | |
469 | error: | |
470 | return ret; | |
471 | } | |
331744e3 JD |
472 | |
473 | /* | |
474 | * Handle the metadata requests from the UST consumer | |
475 | * | |
476 | * Return 0 on success else a negative value. | |
477 | */ | |
478 | int ust_consumer_metadata_request(struct consumer_socket *socket) | |
479 | { | |
480 | int ret; | |
481 | ssize_t ret_push; | |
482 | struct lttcomm_metadata_request_msg request; | |
483 | struct buffer_reg_uid *reg_uid; | |
484 | struct ust_registry_session *ust_reg; | |
485 | struct lttcomm_consumer_msg msg; | |
486 | ||
487 | assert(socket); | |
488 | ||
489 | rcu_read_lock(); | |
331744e3 JD |
490 | health_code_update(); |
491 | ||
492 | /* Wait for a metadata request */ | |
dc2bbdae | 493 | pthread_mutex_lock(socket->lock); |
52898cb1 | 494 | ret = consumer_socket_recv(socket, &request, sizeof(request)); |
dc2bbdae | 495 | pthread_mutex_unlock(socket->lock); |
52898cb1 | 496 | if (ret < 0) { |
331744e3 JD |
497 | goto end; |
498 | } | |
499 | ||
1950109e | 500 | DBG("Metadata request received for session %" PRIu64 ", key %" PRIu64, |
331744e3 JD |
501 | request.session_id, request.key); |
502 | ||
503 | reg_uid = buffer_reg_uid_find(request.session_id, | |
504 | request.bits_per_long, request.uid); | |
505 | if (reg_uid) { | |
506 | ust_reg = reg_uid->registry->reg.ust; | |
507 | } else { | |
508 | struct buffer_reg_pid *reg_pid = | |
1950109e | 509 | buffer_reg_pid_find(request.session_id_per_pid); |
331744e3 | 510 | if (!reg_pid) { |
1950109e JD |
511 | DBG("PID registry not found for session id %" PRIu64, |
512 | request.session_id_per_pid); | |
331744e3 | 513 | |
53efb85a | 514 | memset(&msg, 0, sizeof(msg)); |
331744e3 JD |
515 | msg.cmd_type = LTTNG_ERR_UND; |
516 | (void) consumer_send_msg(socket, &msg); | |
517 | /* | |
518 | * This is possible since the session might have been destroyed | |
519 | * during a consumer metadata request. So here, return gracefully | |
520 | * because the destroy session will push the remaining metadata to | |
521 | * the consumer. | |
522 | */ | |
523 | ret = 0; | |
524 | goto end; | |
525 | } | |
526 | ust_reg = reg_pid->registry->reg.ust; | |
527 | } | |
528 | assert(ust_reg); | |
529 | ||
dc2bbdae | 530 | pthread_mutex_lock(&ust_reg->lock); |
331744e3 | 531 | ret_push = ust_app_push_metadata(ust_reg, socket, 1); |
dc2bbdae | 532 | pthread_mutex_unlock(&ust_reg->lock); |
2c57e06d MD |
533 | if (ret_push == -EPIPE) { |
534 | DBG("Application or relay closed while pushing metadata"); | |
535 | } else if (ret_push < 0) { | |
331744e3 JD |
536 | ERR("Pushing metadata"); |
537 | ret = -1; | |
538 | goto end; | |
2c57e06d MD |
539 | } else { |
540 | DBG("UST Consumer metadata pushed successfully"); | |
331744e3 | 541 | } |
331744e3 JD |
542 | ret = 0; |
543 | ||
544 | end: | |
331744e3 JD |
545 | rcu_read_unlock(); |
546 | return ret; | |
547 | } |